Thoses numbers are old.
Healers is a must to get your belt and bracer PvE for more stats. The healing buff from Expertise get diminishing returns really fast.
DPS wise is different. I was doing more damage with PvE belt and Bracer with my sage DPS instead of the PvP one.
where is the DR for expertise then, it was "removed" when 1.2 launched and no changes have been made since. you were doing more damage with PVE gear, but you did not take into account your opponents Expertise. What were their Expertise? that info is needed before you say you did more damage in PVE bracers/belts.